The sigma 150 600mm f5 63 contemporary dg os hsm lens is a portable telephoto zoom for shooting wildlife sport and travel photography dust and splash proof to accommodate photography in the field and featuring a detachable tripod socket for more convenient handheld photography this lens is a lightweight high performance model offering outstanding usability this lens boasts the latest sigma technology such as a quiet and optimised hyper sonic motor hsm and a new optical stabiliser os w